Calibration bath



FIG. 1 is a top front right perspective view of a calibration bath showing our new design.

FIG. 2 is a bottom rear left perspective view thereof.

FIG. 3 is a front elevational view thereof.

FIG. 4 is a right side elevational view thereof.

FIG. 5 is a left side elevational view thereof.

FIG. 6 is a top plan view thereof.

FIG. 7 is a rear elevational view thereof; and,

FIG. 8 is a bottom plan view thereof.

The broken lines in the figures illustrate portions of the calibration bath that form no part of the claimed design. 

CLAIM The ornamental design for a calibration bath, as shown and described. 